Britain's biggest dentistry business is raking in tens of millions of pounds in profit while its NHS work shrinks, a Mirror investigation reveals. MyDentist, which runs more than 500 practices with over four million patients, has tripled the size of its private practice amid a national crisis over access to NHS dentists. The Mirror called 100 practices on the MyDentist website listed as “NHS and private” and discounted those it listed as “private only”. But even among those it says are NHS